昆明城市绿地土壤水分入渗测试方法对比研究

Comparative Study on Determining Methods of Soil Moisture Infiltration in Urban Green Space of Kunming

土壤水分入渗率是决定坡地降水入渗与径流比例的关键,也是水分循环和土壤侵蚀模型中的重要参数.采用人工模拟降雨、双环入渗、圭尔夫入渗、环刀室内入渗测定法,对昆明城市绿地进行了渗透实验和分析研究,得出4种土壤水分入渗测定方法测得的土壤水分入渗率存在明显差异.通过对土壤水分入渗过程线对比,最终选取最为接近人工模拟降雨土壤水分入渗过程的双环入渗测定方法作为最适宜该实验地的土壤水分入渗测定方法.

Soil moisture infiltration rate is a key to determine the infiltration of precipitation and slope runoff percentage, but also an important factor of soil moisture circulation and soil erosion models. By using methods of artificial rainfall, double infiltration, infiltration of Guelph, indoor ring knife infiltration assay, permeation experiments and analysis of urban green space in Kunming, have been carried out, the results showed the determination of soil moisture infiltration rates were significantly different. Through the comparison of soil moisture infiltration process line, the double-ring infiltration experiment which was the most closest to the rainfall infiltration process was the most suitable method for the infiltration experiments to determine soil moisture infiltration.